Update T1070.002.md

[mthcht]

Details:

• removed a typo 'lol' > 'log'
• removed extra colon in /var/log/messages:
• additional example usage (no-op to truncate a file)

Testing:

Associated Issues:

[clr2of8]

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Note: the markdown (md) files are auto-generated from MITRE ATT&CK data and from the yaml files in this repo. Only the updates made to the yaml file will be reflected in the auto-generated md file. The other fixes would need to be made to the MITRE ATT&CK data which isn't controlled here.